Determination of the parameters of a hydraulic hammer bucket

The task of developing frozen soil in cramped conditions, on sites with a small work source and on sites near industrial and civil facilities can be solved by equipping the excavator with replaceable hydraulic hammer equipment (for preparing the soil for development) and an active bucket with hydraulic hammers (for direct development). The efficiency of these machines is explained by the fact that part of the power is transmitted directly to the working element, bypassing intermediate links. A variant of improving the excavator bucket by adding two hydraulic hammers to the design is proposed. The article contains a general view in two projections of the improved working equipment. The article also presents a hydraulic diagram of the hydraulic hammers of the modernized working equipment. Equipping the excavator with replaceable equipment in the form of an active bucket preserves all the capabilities of the base machine: versatility, mobility, maneuverability, autonomy. Before carrying out the work on simulation modeling, it is necessary to conduct a number of theoretical studies to determine the main parameters of the hydraulic hammer of the active bucket. This became the purpose of conducting these theoretical studies. Numerical expressions are given for determining such parameters as the rod diameter, the length of the shut-off and control device, the flow area, the maximum diameter of the control chamber, the volume of the control chamber, and the pressure at the pump outlet. As a result of the theoretical studies, a number of graphical dependencies were constructed that allow establishing the relationship between the parameters. As an example, the article presents a graphical dependence of the striker strike frequency on the pump flow rate when changing the diameter of the adjustment throttle. The studies have shown the operability of the design schemes of the proposed designs of hydraulic impact devices.